[1]马建明,刘江山,刘志海,等.铁基超导体中间隙铁杂质诱导的隙内束缚态[J].四川师范大学学报(自然科学版),2020,43(04):506-515.[doi:10.3969/j.issn.1001-8395.2020.04.014]
 MA Jianming,LIU Jiangshan,LIU Zhihai,et al.In-gap Bound States Induced by Interstitial Fe Impurities in Iron-based Superconductors[J].Journal of SichuanNormal University,2020,43(04):506-515.[doi:10.3969/j.issn.1001-8395.2020.04.014]
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铁基超导体中间隙铁杂质诱导的隙内束缚态()
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《四川师范大学学报(自然科学版)》[ISSN:1001-8395/CN:51-1295/N]

卷:
43卷
期数:
2020年04期
页码:
506-515
栏目:
基础理论
出版日期:
2020-06-20

文章信息/Info

Title:
In-gap Bound States Induced by Interstitial Fe Impurities in Iron-based Superconductors
文章编号:
1001-8395(2020)04-0506-10
作者:
马建明1 刘江山2 刘志海3 郑铁军4 张德刚5*
1. 成都工业学院 电子工程学院, 四川 成都 611730; 2. 四川省金堂中学, 四川 成都 610400; 3. 中山大学 物理学院, 广东 广州 510275; 4. 成都纺织高等专科学校 基础部, 四川 成都 611731; 5. 四川师范大学 物理与电子工程学院, 四川 成都 610101
Author(s):
MA Jianming1 LIU Jiangshan2 LIU Zhihai3 ZHENG Tiejun4 ZHANG Degang5
1. School of Electronic Engineering, Chengdu Technological University, Chengdu 611730, Sichuan; 2. Sichuan Jintang High School, Chengdu 610400, Sichuan; 3. School of Physics, Sun Yat-sen University, Guangzhou 510275, Guangdong; 4. Department of Fundamental Courses, Chengdu Textile College, Chengdu 611731, Sichuan; 5. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, Sichuan
关键词:
铁基超导体 间隙铁杂质 隙内束缚态
Keywords:
iron-based superconductors interstitial Fe impurities in-gap bound state
分类号:
O469
DOI:
10.3969/j.issn.1001-8395.2020.04.014
文献标志码:
A
摘要:
基于两轨道四带紧束缚模型,用T矩阵方法研究铁基超导体中间隙铁杂质诱导的隙内束缚态.研究表明,间隙铁杂质点和最近邻铁点上的局域态密度有很强的隙内共振峰,并且随着参数t和ΔI的变化而发生明显的改变.共振峰位置和高度仅取决于间隙铁和最近邻铁之间的跃迁参数t和配对参数ΔI.此类隙内束缚态可以通过扫描隧穿实验直接观察到.
Abstract:
Based on a two-orbit four-band tight binding model, we investigate the in-gap bound states induced by interstitial Fe impurities in iron-based superconductors by using T-matrix approach. It is shown that the local density of states at the interstitial Fe impurity(IFI)and the nearest neighboring(NN)Fe of IFI has the strong resonance peaks inside the gap, whose locations and heights depend on the hopping parameter t and the pairing parameter ΔI between the IFI and the NN Fe sites. These in-gap bound states could be observed by scanning tunneling microscopy experiments.

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备注/Memo

备注/Memo:
收稿日期:2017-09-18 接受日期:2019-06-10
基金项目:四川省“千人计划”项目(34125003)
*通信作者简介:张德刚(1962—),男,教授,主要从事超导理论、拓扑绝缘体、自旋电子学和统计模型精确解的研究,E-mail:degangzhang@yahoo.com
更新日期/Last Update: 2020-06-20